[nostalgia/core/gba] Add hideSprite and add flipX parameter to setSrpite

src/nostalgia/core/sdl/gfx.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 - 2019 gtalent2@gmail.com
+ * Copyright 2016 - 2020 gary@drinkingtea.net
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -200,7 +200,10 @@ void setTile(Context *ctx, int layer, int column, int row, uint8_t tile) {
 	id->bgTileMaps[z][y][x] = tile;
 }
 
-void setSprite(unsigned, unsigned, unsigned, unsigned, unsigned, unsigned) {
+void hideSprite(unsigned) {
+}
+
+void setSprite(unsigned, unsigned, unsigned, unsigned, unsigned, unsigned, unsigned) {
 }
 
 }